Earthquake · reviewed by a seismologist
M 1.8md
5km NNW of Green Valley, CA
- When
- Magnitude
- M 1.8 (md)
- Depth
- 4.4 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Solano County, 22 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2425 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.
How big was it?
This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 810,000× the energy of this one
- Around the size people start to feel M 3.0 72× the energy of this one
- This earthquake M 1.8 about 13 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
Where
Epicentre 38.2970, -122.1850. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Solano County, CA | 22 km (13 mi) | W of here | earthquakes near Solano County |
| Napa County, CA | 26 km (16 mi) | SSE of here | earthquakes near Napa County |
| Contra Costa County, CA | 47 km (29 mi) | NNW of here | earthquakes near Contra Costa County |
| Yolo County, CA | 49 km (31 mi) | SSW of here | earthquakes near Yolo County |
| Marin County, CA | 56 km (35 mi) | ENE of here | earthquakes near Marin County |
| Sonoma County, CA | 69 km (43 mi) | ESE of here | earthquakes near Sonoma County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 2.0 3km SW of American Canyon, CA
- 1.5 12km E of Yountville, CA
- 1.6 12km E of Angwin, CA
- 1.8 1km WNW of Kensington, CA
- 1.8 7km N of Orinda, CA
- 1.9 5km ENE of Vallejo, CA
- 1.5 12km NE of Yountville, CA
- 1.9 1km NW of Pleasant Hill, CA
- 1.6 2km NNW of Crockett, CA
- 2.0 2km NNW of Crockett, CA
- 2.0 2km E of Berkeley, CA
- 2.6 2km E of Berkeley, CA
- 1.9 1km WSW of Pittsburg, CA
- 1.7 1km S of Kensington, CA
- 2.0 1km W of Pleasant Hill, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
For this area
The largest earthquake within 50 km in our catalogue was M 4.5 on 2019-10-15 — it released about 11,000 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.